Photograph of a Alpine Forget-Me-Not.

From introduction: This report presents the results of an investigation of the ground-water resources of the central part of La Plata County, Colorado. The purpose of the investigation is to describe the geologic units and the availability and quality of ground water in the central part of the county.

From introduction: This report presents the results of an investigation of the ground-water resources of the Crystal River and Cattle Creek drainage basins...The purpose of the investigation was to describe the geologic units, the aquifers and their characteristics, and the availability and chemical quality of ground water in the study area.

Photograph of Big Thompson Canyon.

Photograph of Box Canyon Falls, in Ouray, CO.

Photograph of Cascade Falls, in Ouray, CO.

Photograph of a passenger train, arriving in Silverton, from Durango, CO.

Photograph of a passenger train, going through Animas Gorge, running from Durango to Silverton, CO.

Photograph of a passenger train, on a cliff side, running from Durango to Silverton, CO.

Photograph of a passenger train, going through a rock cut, running from Durango to Silverton, CO.

Envelope from Armando C. de Baca, attorney at law, to John J. Herrera, League of United Latin American Citizens National Advisor, postmarked in Denver, Colorado, in 1976.

Three laser research programs are proposed: (1) to find new laser systems in the wavelength region between 2000 and 4500 A; (2) to attempt scaling lasers to high output power; and (3) to focus research on metal vapor laser systems which have promise of high efficiency. Twenty-eight new laser transitions from Cu II spanning the wavelength region from 2486 to 7988 A have been observed. A list of papers and conferences are given that summarize the metal vapor laser research. (TFD)

The absorption process of particulate matter at an air-water interface was studied by means of a Monte Carlo Simulation. This absorption process does not appear to be significantly different from similar processes over stationary boundaries. Especially an increased flux toward the boundary as the result of more effective particle removal due to wave action could not be observed. The particular nature of the tracer prevents this from happening.

Gut contents of 2,500 stonefly nymphs, comprising 10 species, from the Gunnison and Dolores Rivers, Colorado were examined from Dec., 1974-Oct., 1975. Perlidae species were carnivorous feeding primarily on chironomids, mayflies and caddisflies. Seasonal patterns of ingestion and preference varied among species and predator sizes and between rivers. Early instar polyphagous species utilized detritus in the fall, eventually shifting to carnivorous habits as they grew through winter-spring. Pteronarcids fed predominantly on detritus. Dietary overlap of predators was greatest in the Gunnison River, with subtle mechanisms such as prey species and size selectivity, temporal succession and seasonal shifts to detritus-plant material in some, providing reduction of competition. A more complete partitioning of prey resources was evident in the Dolores River.

Photograph of Pikes Peak and Gateway Rocks, in the Garden of the Gods Visitor and Nature Center.

Photograph of the Gateway Rocks, from the south, in the Garden of the Gods Visitor and Nature Center.

Photograph of the Cathedral Spires and Gateway Rocks, in the Garden of the Gods Visitor and Nature Center.

The occurrence of mistral winds in the Mediterranean shows a correlation with blocking activity over the eastern Atlantic. Apparently for this reason periods with a ''midwinter dip'' in the zonal available potential energy of the northern hemisphere are favored by mistral occurrence. There also is a tendency for a 22- to 26-day cycle to appear in pressure gradients at the 500- and 100-mb surfaces along the southern coast of France. Such pressure gradients, if they exceed a certain magnitude, are indicative of mistral episodes.

Letter from Armando C. de Baca to Manuel Gonzales, dated July 12, 1976. In the letter, de Baca discusses the challenged election of the LULAC State Director of Colorado and de Baca's proposed rules for a special election.

Letter from Armando C. de Baca to Maria Olivas regarding the rules for the special election for LULAC, dated August 27, 1976.

Letter from Joe Herrera to Belen Robles, LULAC Vice-President for Southwest, serves as Herrera's official challenge against Leo Cardenas' eligibility to run for office of League of United Latin American Citizens State Director of Colorado. The letter is dated June 8, 1976.

Onionskin paper carbon copy of letter from John J. Herrera to Armando C. de Baca, dated July 26, 1976. The letter refers to Herrera's legal opinion regarding the matter of Leo Cardenas and approves of the submitted proposals for a special election.

Letter from Mary Olivas to Manuel Gonzales,dated July 9, 1976, and printed on League of United Latin American Citizens letterhead. The letter is regarding the conciliatory decision reached at the 1976 National Convention regarding the Colorado State Director and legal opinion on its resolution. The envelope for the letter is included and postmarked July 12, 1976.

Mailgram addressed to Manuel Gonzales and dated December 14, 1976. The message confirms a mailgram from Ray A. Gano, Abrazar Project Task Force Chairman, to Joe R. Benites at Adolph Coors. The message requests a response regarding the audit report and interrogatories about the Abrazar Program.